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Finding the Fourth Proportional to 957.17, 1,320.95 and 626.48

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Solution

The fourth proportional to 957.17, 1,320.95 and 626.48 is: 864.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    957.17 : 1,320.95 = 626.48 : x
  2. Step 2: Convert to fraction form
    957.17/1,320.95 = 626.48/x
  3. Step 3: Cross multiply
    957.17x = 1,320.95 × 626.48
  4. Step 4: Simplify right side
    957.17x = 827,548.76
  5. Step 5: Solve for x
    x = 827,548.76/957.17
  6. Step 6: Final answer
    x = 864.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.